1994A&A...291..411A

Query : 1994A&A...291..411A

1994A&A...291..411A - Astronomy and Astrophysics, volume 291411-419 (1994/11-2)

Gravitational lensing of Q 0957+561: a study of the cluster at z=0.355.

ANGONIN-WILLAIME M.-C., SOUCAIL G. and VANDERRIEST C.

Abstract (from CDS):

Redshift measurements for 38 objects as well as VRI photometric data for ∼200 objects have been obtained in the field of the multiply imaged QSO 0957+561. The data analysis leads to the identification of a cluster at <z> = 0.355 surrounding the central lens galaxy G1, with a velocity dispersion 715 ± 130 km/s. This cluster is identified as a poor to medium-rich cluster, dominated by a giant elliptical galaxy (G1), and with a large fraction of late type galaxies. Another group or cluster, located at about 2' from G1 and centered on G5, is identified at a redshift of 0.5, in accordance with previous results. The high degree of contamination along the line-of-sight is also examined. The consequences of these observational results for the modeling of the lens and the evaluation of the Hubble constant H0 are briefly discussed.

Abstract Copyright: ∼

Journal keyword(s): gravitational lensing - galaxies: clusters of - quasars: individual: Q 0957+561 - galaxies: distances and redshifts - distance scale

Nomenclature: Table 2: ASV NN (Nos 1-38)

CDS comments: p. 412, S95132=SA 95-132 , G16350=G 163-50

Simbad objects: 40

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Number of rows : 40
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 TYC 66-860-1 * 03 54 51.6848240208 +00 05 21.400124352 12.823 12.512 12.067 11.804 11.521 A4 15 0
2 LEDA 2517881 SyG 10 01 09.0152299968 +55 53 07.737335952     17.28     ~ 10 0
3 ASV 2 G 10 01 09.568 +55 54 19.04           ~ 2 0
4 ASV 3 G 10 01 10.220 +55 53 24.73           ~ 5 0
5 ASV 4 G 10 01 11.29 +55 51 14.6           ~ 1 0
6 ASV 5 G 10 01 11.574 +55 54 34.75           ~ 7 0
7 ASV 6 G 10 01 11.647 +55 55 01.08           ~ 2 0
8 ASV 7 G 10 01 11.92 +55 56 06.7           ~ 1 0
9 ASV 8 G 10 01 13.31 +55 55 53.1           ~ 1 0
10 ASV 9 G 10 01 13.523 +55 53 54.70           ~ 1 0
11 ASV 10 G 10 01 14.391 +55 53 18.77           ~ 1 0
12 ASV 11 * 10 01 15.181 +55 52 49.60           ~ 1 0
13 ASV 12 G 10 01 15.726 +55 54 25.93           ~ 5 0
14 ASV 14 G 10 01 16.12 +55 56 25.1           ~ 1 0
15 ASV 15 G 10 01 16.593 +55 52 52.04           ~ 1 0
16 ASV 16 ? 10 01 17.78 +55 51 19.0           ~ 1 0
17 ASV 13 G 10 01 18.04 +55 53 45.0           ~ 5 0
18 ASV 17 G 10 01 19.934 +55 52 23.51           ~ 1 0
19 8C 0958+561 QSO 10 01 20.6918953728 +55 53 55.593949272   17.16 16.95     ~ 757 3
20 ASV 18 G 10 01 21.01 +55 51 58.7           ~ 1 0
21 ASV 19 G 10 01 21.404 +55 53 04.12           ~ 2 0
22 ASV 20 G 10 01 21.72 +55 53 52.7           ~ 5 0
23 ASV 21 G 10 01 22.243 +55 53 46.97           ~ 2 0
24 ASV 22 G 10 01 23.161 +55 54 48.94           ~ 1 0
25 [VV96] J100123.6+555145 QSO 10 01 23.605 +55 51 43.01           ~ 3 0
26 ASV 25 G 10 01 24.25 +55 51 15.4           ~ 1 0
27 ASV 26 G 10 01 24.406 +55 54 07.22           ~ 2 0
28 ASV 28 G 10 01 25.39 +55 51 52.0           ~ 1 0
29 ASV 27 * 10 01 25.45 +55 56 40.8           ~ 1 0
30 ASV 29 G 10 01 26.286 +55 52 37.36           ~ 2 0
31 ASV 30 G 10 01 26.367 +55 54 33.46           ~ 2 0
32 ASV 32 G 10 01 26.92 +55 51 13.7           ~ 1 0
33 ASV 33 G 10 01 27.04 +55 52 11.7           ~ 1 0
34 ASV 31 SyG 10 01 27.071 +55 55 23.21     21.14     ~ 5 0
35 ASV 34 ? 10 01 27.30 +55 50 51.2           ~ 1 0
36 ASV 35 G 10 01 28.252 +55 54 55.03           ~ 1 0
37 ASV 36 * 10 01 30.740 +55 53 37.03           ~ 2 0
38 ASV 37 G 10 01 31.16 +55 56 21.2           ~ 1 0
39 ASV 38 G 10 01 32.17 +55 56 16.6           ~ 1 0
40 EGGR 76 WD* 11 07 59.9504280373 -05 09 26.034289695 12.397 13.093 13.057 13.141 13.215 DA3 172 0

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